Control system used for accurately sensing air pressure of hydrodynamic retarder

Abstract

The invention discloses a control system used for accurately sensing air pressure of a hydrodynamic retarder. The control system comprises a controller, a proportional valve and an air pressure sensor, wherein the proportional valve and the air pressure sensor are electrically connected with the controller. The sensing end of the air pressure sensor penetrates through the portion, between an oil storage cavity and a working oil cavity, of a shell of the hydrodynamic retarder, and then is arranged in the oil storage cavity. The air intake portion of an oil-gas separation channel of the air pressure sensor and the air intake portion of the oil-gas separation channel of the hydrodynamic retarder are located in the oil storage cavity by the same horizontal height. The interval between the air pressure sensor and the upper side wall ranges from 10 mm to 30 mm. The interval between the air pressure sensor and the left side wall of the shell ranges from 50 mm to 80 mm. By arranging the air pressure sensor on the portion, between the oil storage cavity and the working oil cavity, of the shell, few parts are mounted on the portion, between the oil storage cavity and the working oil cavity, of the shell, and compressed air is distributed evenly, and therefore the accuracy of air pressure detection is improved; and as the air pressure sensor is located in a good detection environment, the timeliness and accuracy of detection on air pressure in the oil storage cavity are improved, and accordingly the operation efficiency of an air pressure sensing control system is improved.

Description

technical field [0001] The invention relates to the technical field of automobile auxiliary braking devices, in particular to a control system for accurately sensing the air pressure of a hydraulic retarder. Background technique [0002] Hydraulic retarder is an auxiliary braking device for automobiles, mainly used in large passenger cars, urban public transport vehicles, heavy trucks, special vehicles and military vehicles, etc. The hydraulic retarder includes controllers, housings, heat exchangers, etc. The casing has an oil storage chamber and a working oil chamber, and the working oil chamber is provided with a rotor impeller and a stator impeller. The rotor impeller and the output shaft of the automobile transmission box rotate synchronously. When the automobile is running, the rotor impeller also rotates. When the hydraulic retarder is working, compressed air enters the oil storage chamber, and the medium oil in the oil storage chamber is pressed into the cavity betwee...

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Problems solved by technology

[0003] When the hydraulic retarder is working, the compressed air in the oil storage chamber maintains a certain pressure. If the air pressure is too small, the medium oil in the working oil chamber will be insufficient, and the deceleration effect on the vehicle will not be good. If the air pressure is too large, the oil temperature will easily Elevation damages related parts, so it is necessary to detect the air pressure in the oil storage chamber in real time and pay attention to adjustments. In related technologies, the installation positions of the air pressure sensors used to detect the compressed air pressure in the oil storage chamber are different, and the air pressure detection is not timely enough. Accurate, affecting the working efficiency of the entire air pressure sensing control system of the hydraulic retarder

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